I also like to us a good high bandwidth 10X probe instead of a FET probe.
However, the user must be very careful as a 10X probe looks like
500 ohms to ground to the LVDS output. When you only have 3-4ma
of current swings you do not want 1.2/500 = 2.4ma pulled to ground.
Depending on the LVDS design you won't just get reduced swings you
may get nothing if the buffer is pulled out of its bias range. Luckily
I have always have control of the bit pattern coming out of
the LVDS buffer. Therefore I simply apply a well balanced
2^N-1 PRBS code so I can use AC coupling from my 10X probe into
my 50 ohm oscilloscope to do my evaluations.

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